Toward density-functional theory-based structure-conductance relationships in single molecule junctions

0563251 - FZÚ 2023 RIV US eng J - Článek v odborném periodiku
Vázquez, Héctor
Toward density-functional theory-based structure-conductance relationships in single molecule junctions.
Journal of Physical Chemistry Letters. Roč. 13, č. 40 (2022), s. 9326-9331. ISSN 1948-7185
Grant CEP: GA ČR GA19-23702S
Institucionální podpora: RVO:68378271
Klíčová slova: chemical calculations * electrical conductivity * gold * mathematical methods * molecules
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 5.7, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1021/acs.jpclett.2c02349

A method is presented that allows for the calculation using density functional theory (DFT) of the tunneling conductance of single molecule junctions for thousands of junction structures. With a single scaling parameter, conductance is evaluated from clusters consisting of the molecule bonded to one Au atom at each end. Junction geometries are obtained without any constraints from ab initio molecular dynamics simulations at room temperature. This method accurately reproduces standard DFT-based conductance values for several molecular and electrode structures while reducing the computational cost by a factor of ∼400×, allowing for the conductance of tens of thousands of geometries to be computed. When applied to a pair of conjugated molecules, these large data sets quantify the effect on conductance of molecular structure or quantum chemical properties. This methodologyy enables reliable DFT-based conductance calculations at a negligible computational cost and opens the way to quantitative structure−conductance relationships.

Trvalý link: https://hdl.handle.net/11104/0336087